Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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The Concentrations and Loads of Pollutant in Wet Deposition in Cheongju

습성강하물 중의 오염물질의 농도와 부하 - 충북 청주시를 중심으로-

  • Published : 2004.11.01
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Abstract

The concentrations and loads of total nitrogen (TN), total phosphorus (TP), and chemical oxygen demand (COD) in wet deposition were investigated at Chungbuk National University in Cheongju, Chungbuk. Event based precipitation samples were collected during 1998 to 2003. The precipitation-weighted mean concentrations of pollutants were 0.60 mg/L for TN, 0.014 mg/L for TP, and 4.8 mg/L for COD, which were smaller than its arithmetic mean concentrations by 26% for TN, 18% for TP, and 14% for COD. The concentrations of TN, TP, and COD significantly decreased with precipitation. Mean concentrations of pollutants in spring (March-May) were higher than in other seasons likely due to dust caused by wind erosion and sand-dust storms, pollen etc. Significant relationships were determined between TN and TP, and TN and COD. Annual loads of wet deposition averaged 7.9 kg/ha$\cdot$yr for TN, 0.19 kg/ha$\cdot$yr for TP, and 63.9 kg/ha$\cdot$yr for COD, which are almost identical to the values of TN and TP but slightly higher than COD value reported in Japan.

충북 청주시에 위치한 충북대학교에서 강수에 따른 습성강하물 중의 TN, TP 및 COD의 농도와 오염부하를 조사하였다 강수사상에 대한 샘플은 1998년에서 2003년까지 채집되었다. 오염물질의 강수량가중평균 농도는 TN이 0.60mg/L, TP가 0.014mg/L, COD는 4.8mg/L이었는데, 이는 각각의 산술평균보다 26, 18, 14% 작게 나타났다. TN, TP 및 COD의 농도는 강수량이 증가함에 따라 감소하는 경향을 나타냈다. 모든 수질항목은 됨에 가장 많이 나타났는데, 이는 풍식 및 황사에 의한 먼지, 꽃가루 등 때문으로 생각된다. 습성강하물의 평균 연간부하는 TN 7.9kg/ha$\cdot$yr, TP 0.19kg/ha$\cdot$yr, COD 53.9ka/ha$\cdot$yr로 나타났는데, 이를 일본에서 보고된 각각의 연간부하와 비교하면 TN과 TP는 비슷했으나, COD는 약간 놀게 나타났다.

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References

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